HARDWARE INSTALLATION
25
LED
Normal Status
Problem Indication
Fault LED
1. When the fault LED is lit,
there is no disk present.
2. When the fault LED is not
lit, then disk is present
and status is normal.
1. When the fault LED is blinking
(2 times/sec), that disk drive
has failed and should be hot
swapped immediately.
2. When the activity LED is lit and
fault LED is fast blinking (10
times/sec) there is rebuilding
activity on that disk drive.
If the system will use only a single global indicator, attach the
LED to the two pins of the global activity/cache write-pending
connector. The global fault pin pair connector is the overall fault
signal. This signal will light up in any disk drive failure.
The following diagrams show all LEDs, connectors and pin
locations.
Figure 2-10, ARC-1215-4i/
1225-8i LED Indicator Con-
nector
B: Areca Serial Bus Connector
You can also connect the Areca interface to a proprietary SAS/
SATA backplane enclosure. This can reduce the number of activity
LED and/or fault LED cables. The I
2
C interface can also cascade to
another SAS/SATA backplane enclosure for the additional channel
status display.
